Transferred signal protection processing device

Abstract

The invention provides a transferred signal protection processing device, which comprises a shielding box, a transferred signal protection processing circuit, an external transferring board and an internal transferring board, wherein the shielding box is a sealed metal box in which the transferred signal protection processing circuit is arranged; the external transferring board and the internal transferring board are separately arranged and fixed on box boards of the shielding box in an electric communication mode, or the external transferring board and the internal transferring board directly adopt one of the box boards respectively; a wiring column and / or a connector of which an input end is arranged outside the shielding box and an output end is arranged inside the shielding box is arranged on the external transferring board; the transferred signal protection processing circuit comprises a lightning protection circuit and a filtering circuit; the input end of the transferred signal protection processing circuit is connected with an external signal line which comes from the external transferring board; a filtering capacitor which passes through the internal transferring board is arranged on the internal transferring board; and an output terminal of the filtering capacitor is arranged outside the shielding box, and an input terminal of the filtering capacitor is connected with an output line of the transferred signal protection processing circuit. By adoption of the transferred signal protection processing device, a good shielding effect can be achieved.

Description

technical field [0001] The present invention relates to signal processing technology, in particular to a transfer signal protection processing device. Background technique [0002] For some vehicle-mounted communication equipment, such as mobile TV relay vans, the signal circuit inside the vehicle needs to be switched with the signal circuit outside the vehicle. Due to the large outdoor electromagnetic interference and natural disasters such as lightning, it often affects the normal operation of communication equipment, and may even cause equipment failure in extreme cases. In order to make the entire communication system work normally and protect the communication equipment in the car, it is necessary to carry out protective treatment at the signal transfer position. [0003] In the prior art, in order to protect the vehicle communication equipment, the vehicle is usually equipped with a simple surge voltage protection device to protect and filter the signal transferred fr...

AI Technical Summary

Problems solved by technology

[0005] First of all, the protection circuit in the prior art may introduce electromagnetic interference due to the complex electromagnetic environment of the external environment.

[0006] Secondly, the existing general-purpose signal arrester does not consider the electrical characteristics of the signal arrester itself, which is likely to cause interference to some particularly important or sensitive electronic equipment, which reduces the reliability of the equipment and affects the processing of signal filtering and electromagnetic shielding

[0007] Thirdly, under the existing technology, more lightning arresters and filters are required for simultaneous protection of multi-channel communication signals, and more signal lines are connected.

[0008] Finally, the internal structure of existing surge arresters and filters is complicated, and normal maintenance is difficult

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